JP6085428B2 - Static mixers and mixing elements for static mixers - Google Patents

Description

  The present invention relates to a plastic static mixer including an installation body for installation in a tubular mixer housing. The installation body has a longitudinal axis that is aligned with the direction of the fluid flowing into the installation body so that it can extend into the mixing space. The mixing space has a cross-sectional flow region in a plane perpendicular to this longitudinal axis, which corresponds to the cross-sectional flow region of the essentially tubular mixer housing. The installation body includes a wall element for separating and / or deflecting the fluid flow away from the longitudinal axis.

  Such a static mixer is known, for example, from EP14260999B1. In this static mixer, the two components are mixed together by a plurality of the same type of mixing elements in a three-part mixing process that first separates the material and then spreads and moves it. This mixing process must be performed multiple times depending on the physical properties of the components. For this reason, a static mixer contains the some installation body of the same structure arrange | positioned back and forth with respect to each other. These mixers are particularly used to mix small amounts of ingredients, ie from a few milliliters to about 1,000 milliliters. These mixers therefore have a mixing space with a diameter of less than 16 mm and a length of more than 50 mm. For this reason, the wall thickness of the wall elements of this mixer is less than 1 mm and often less than 0.5 mm.

  Such a static mixer of plastic according to EP14260999B1 is preferably produced by an injection molding process. As shown in FIG. 1 of this patent, using an injection molding process to produce a mixer with a length of less than 30 mm and a wall thickness of less than 3 mm, the mixer disposed on the opposite side from the injection point of the injection molding tool Previously this was not possible because the flow to the end required too high internal tool pressure. In order to make it possible to economically manufacture static mixers with such a small wall thickness in an injection molding process, each installation body is connected to an adjacent installation body via bar-like elements. Such bar-like elements, such as those shown as arrangements of two installations according to FIG. 4 of EP2181827A1, corresponding to the embodiment according to FIG. 15 or FIG. The molten polymer can be moved from one installation body to an adjacent installation body to maintain an internal tool pressure of less than 1000 bar and, as a result, damage to the injection molding tool can be prevented. The main difference from EP1426099B2 is that the rod-like element of EP2181827A1 works only to connect one installation body to an adjacent installation body. On the other hand, the bar-like element according to FIG. 15 of EP14260999B1 can extend over a plurality of installation bodies. Since the rod-shaped elements take up space in the mixing space, if possible, or simply connect several of the installation bodies (up to 5 installation bodies according to FIG. 15 of EP14260999B1) to each other, if possible When designed, it was avoided. According to the method according to EP2181827, it was only possible to provide rod-like elements each connecting two adjacent installation bodies to each other. However, it has been found that this development is disadvantageous in that the stability of the mixing element constituted by the installation body is also affected. It has been found that mixing elements can break, particularly in the distribution of viscous materials.

EP14260999B1 EP2181827A1 EP1312409B1

  The object of the present invention is to provide a more stable mixing element in which the pressure loss associated with the above solution is simultaneously reduced using the same structure.

  The object of the invention is achieved by a mixing element in which a plurality of installation bodies are connected to one another via a common bar-like element. By providing a rod-like element, the mixing element becomes more rigid, i.e., more resistant to breakage. However, this solution has not been supported by the technical community so far, as it has been said that the provision of rod-like elements increases the pressure loss. This assumption was confirmed for the spiral mixer compared to the mixing element according to EP14260999B1. The force required to dispense the filler material was measured for the filler material A in the case of a spiral mixer and this force was 472 N in the experiment. For the same filler material, a force of 540 N is measured in the case of the mixing element according to EP14260999B1, so that the installed force for this mixing element occupies a higher proportion of the mixing space, so that the force is as high as expected. It has become. Therefore, as expected, the pressure loss of the mixing element according to EP14260999B1 is large.

  If a rod-like element is provided that connects all the installations to each other, the stability of the mixing element is further increased, but the mixing element occupies a higher proportion of the mixing space, so that the pressure loss is also increased and therefore the filler material is distributed. It can be expected that the power to do will increase. Surprisingly, however, the experiment resulted in a power of 493N. This value is between the value for the spiral mixer and the value for the mixing element according to EP14260999B1.

  This experiment was repeated for filler material B. For the use of filler material B, in the case of the spiral mixer, the force was 410 N, 461 N for the mixing element according to EP1426099B1 and 443 N for the mixing element according to the invention.

  The filler material A is sold under the trade name Voco registrado X-tra, and the filler material B is sold under the trade name Kettenbach Monopren.

  The experimental results show that a surprising effect is obtained regardless of the filler material used, and therefore that effect is inherent to the structure of the mixing element.

  Experiments have also found that the mixing elements according to the invention improve the homogeneity of the mixture over the prior art having the same mixer length. In particular, since the pressure loss is reduced, the mixer can be lengthened. The maximum force that can be applied by hand to push the filler material through the mixing element is limited. From this, for the same structure length, the mixing element with reduced pressure loss is easier to handle. Furthermore, the mixing element according to the invention can be extended over prior art mixing elements having installation bodies with higher pressure losses. This means that the mixing element can contain more installation bodies than the mixing element already known, for example from EP2181827A1, and thus it is possible to improve the quality of the mixing.

  The mixing element is provided for a static mixer for installation in a tubular mixer housing. The mixing element has a longitudinal axis, a plurality of installation bodies are arranged along the longitudinal axis, and the first installation body has a first wall element extending in the direction of the longitudinal axis. . The wall element has a first side wall and a second side wall disposed on the opposite side of the first side wall. A deflection element is disposed adjacent to the first wall element, the deflection element having a deflection surface extending laterally with respect to the wall element on both sides of the wall element, the first opening being the first of the wall element. 1 is provided on the deflection surface on the side facing the side wall.

  A second wall element and a third wall element are arranged adjacent to the first opening, the second wall element and the third wall element extending in the direction of the longitudinal axis, and each , Having one inner wall and one outer wall extending substantially in the direction of the longitudinal axis. Each of the inner wall and the outer wall includes an angle between 20 ° and 160 ° with respect to the first side wall or the second side wall of the first wall element. The first opening is disposed between the inner wall of the second wall element and the third wall element, and the second opening is outside one of the outer walls of the second wall element or the third wall element. The second opening is provided in the deflection surface on the side facing the second side wall of the first wall element.

  The second wall element and the third wall element are therefore arranged on the opposite side of the first wall element adjacent to the first opening in the direction of the longitudinal axis, the second wall element and the third wall element. The wall element delimits the passage starting from the first opening and extending in the direction of the longitudinal axis. A second opening is provided in the deflection surface on the side facing the second side wall of the wall element, the second wall element or the third wall element being adjacent to the second opening. Furthermore, the first wall element of the second installation body is adjacent to the second wall element and the third wall element. More than five installation bodies are connected to each other via a common bar-like element.

  The second installation body can in particular also have a first wall element extending in the direction of the longitudinal axis, the first wall element being arranged on the opposite side of the first side wall and the first side wall. Second sidewalls. A deflection element can be arranged adjacent to the first wall element, the deflection element can have deflection surfaces on both sides of the wall element extending transversely to the wall element, and the first opening The deflecting surface can be provided on the side of the wall element facing the first side wall.

  A second wall element and a third wall element can be arranged adjacent to the first opening, the second wall element and the third wall element extending in the direction of the longitudinal axis, and Each has one inner wall and one outer wall extending substantially in the direction of the longitudinal axis. Each of the inner wall and the outer wall can include an angle between 20 ° and 160 ° relative to the first side wall or the second side wall of the first wall element. The first opening can be disposed between the inner wall of the second wall element and the third wall element, and the second opening is an outer wall of the second wall element or the third wall element. It can be arranged one outside and the second opening can be provided in the deflection surface on the side facing the second side wall of the first wall element.

  This means that the second wall element and the third wall element can be arranged on the opposite side of the first wall element adjacent to the first opening in the direction of the longitudinal axis, It means that the wall element and the third wall element can delimit the passage starting from the first opening and extending in the direction of the longitudinal axis. A second opening can be provided in the deflection surface on the side facing the second side wall of the wall element, the second wall element or the third wall element can be adjacent to the second opening. The second installation body consisting of the first wall element, the deflection element, the second wall element and the third wall element is from 10 ° around the longitudinal axis relative to the first installation body It can be arranged in a state rotated by an angle of up to 180 °.

  The second installation body can in particular have the same structure as the first installation body. The first installation body can be arranged in a state rotated by an angle of about 180 ° with respect to the second installation body.

  All installation bodies of mixing elements can be connected in particular by rod-like elements. The rod-like element can be arranged on the outer periphery of the deflection element. The rod-like elements can be provided on each side of the wall element, but it is also possible to provide a plurality of rod-like elements, in particular two respective rod-like elements can be provided on each side of the wall element.

  The wall element can include an angle of 90 to 130 ° with respect to the deflection surface.

  The deflection surface may have a surface that is at least partially curved in the direction of the flowing fluid to deflect the fluid flow in a direction different from the longitudinal axis, in particular in the flow direction and the direction of the mixer housing. A stepped curvature can be provided.

  According to an alternative embodiment, the deflection surface can be substantially flat. In particular, the deflection surface can extend at an angle of substantially 90 ° to the wall element.

  The deflection surface of the first installation body is particularly designed to cover the opening of the second installation body in the direction of the longitudinal axis.

  According to another embodiment, the surface of the deflecting element facing the first side wall of the wall element is at least partly aligned at an angle of 60 ° to 90 ° with respect to the longitudinal axis. It can be located in the plane of direction. Furthermore, the surface of the deflection element facing the second side wall of the wall element can lie in a lateral plane aligned at an angle of 60 ° to 90 ° with respect to the longitudinal axis.

  Reinforcing elements can be provided at their connection points between the second wall element and the third wall element of the first installation body and the first wall element of the second installation body. With this reinforcing element, the transition between the first installation body and the second installation body can be improved in terms of its shape stability and rigidity. The reinforcing element also increases the flow cross section for the molten polymer at the connection point. The reinforcing element can be formed, for example, as a thickened part or as a rib.

  The static mixing element can in particular comprise a foamed polymer. For the production of static mixers that foam during or shortly after injection, polymers containing foam are used for conventional injection molding processes. The injection molding process in particular comprises the step of injecting the polymer containing the foaming agent into the injection molding tool with an internal tool pressure of less than 600 bar, particularly preferably less than 500 bar.

  A static mixer includes a mixing element according to one of the previous embodiments and a mixer housing surrounding the mixing element.

The installation body has a certain length dimension and a certain diameter. In the case of a non-circular tubular mixer housing, when the cross-sectional area of the tubular mixer housing is square, the diameter corresponds to the length of the edge. In the case of other shaped mixer housings, for example in a rectangular or elliptical cross section, the equivalent diameter D _a is the assumption that the cross-sectional area is circular, ie the formula D _a = 2 ^* (A / π) ^1/2 (D _a represents the equivalent diameter, and A is the actual cross-sectional area). The ratio of the longitudinal dimension to the diameter is at least 1, but the diameter must be the diameter of a circular section or the equivalent diameter for a non-circular section.

  The length dimension is the size of the installation body in the direction of the longitudinal axis. The ratio of the length dimension to the diameter can in particular be greater than 1.

  In particular, the plurality of installation bodies can be arranged side by side along the longitudinal axis. Such installation bodies can have the same structure, or installation bodies of different structures can be combined with one another so as to obtain a mixer arrangement as shown in EP1312409B1. Adjacent installation bodies are connected to each other via at least rod-like elements so that the mixing element constituted by the plurality of installation bodies is designed as an integral part. This means that the mixing element as a whole is manufactured with a single injection molding tool.

  The whole installation body or installation bodies can have a longitudinal dimension between 5 and 500 mm, preferably between 5 and 300 mm, preferentially between 50 and 100 mm.

  The static mixer includes a mixing element according to one of the previous embodiments and a mixer housing surrounding the mixing element. The mixing element has a longitudinal axis that, when assembled, coincides with the longitudinal axis of the mixer housing. Accordingly, each of the installation bodies also has this longitudinal axis. The longitudinal axis is aligned with the direction of fluid flowing into the static mixer. The fluid includes at least two components supplied via an inlet element located upstream of the mixing element.

  The product stream to be mixed is deflected by deflection elements inside the mixing space, so that the components entering the tubular mixer housing as strands by the installed mixing elements are continuous while passing through the static mixer. Are divided into strips of reduced width so that components that are difficult to mix or have high viscosity can be processed using this static mixer.

  The fluid to be mixed in principle contains two different components. In most cases, the components are present in the liquid state or as a viscous material. These include, for example, glues, adhesives, but also fluids containing drugs used in the medical field, or fluids for cosmetic applications and foods. Such static mixers are also particularly used as disposable mixers for mixing hardened mixed products of flowable components, such as mixing multi-component adhesives. Another preferred use is in the mixing of impression materials in the dental field.

  The static mixers described so far are suitable as disposable mixers because the production and material costs are reduced as soon as the corresponding injection molding tools are manufactured. Furthermore, static mixers are used in metering and / or mixing units. The static mixer can be attached to a dispensing unit or a dispensing cartridge, in particular a multi-component cartridge. In particular, a multi-component cartridge can be cited as an example including a dispensing device and a tube coupled to the dispensing device and including a static mixer according to one of the previous embodiments.

  The present invention will be described below with reference to the drawings.

2 shows an example of a cross section of a mixing element according to a first embodiment of the invention. FIG. FIG. 6 shows an example of a cross section of a mixing element according to a second embodiment of the invention. FIG. 3 shows an overview of a mixing element with an installation body according to FIG. 2. It is a figure which shows the cross section which passes along the installation body by FIG. It is a figure which shows the cross section which passes along the installation body arrange | positioned adjacent to the installation body by FIG. FIG. 4 shows a section through the static mixer according to FIG. 3 and the inlet part of the mixing element.

  One embodiment of a mixing element 100 for a static mixer according to a first embodiment of the invention is shown in FIG. The mixing element includes an installation body 1 installed in a tubular housing (not shown). The tubular housing serves as a boundary of the mixing space 20 located inside the tubular housing. The fluid to be mixed is basically composed of at least two different components and flows through the mixing space 20. In most cases, the components are present in the liquid state or as a viscous material. These include, for example, glues, adhesives, but also fluids containing drugs used in the medical field, or fluids for cosmetic applications and foods. Such static mixers are also particularly used as disposable mixers for mixing hardened mixtures of flowable components, such as mixing multi-component adhesives. Another preferred use is in the mixing of impression materials in the dental field.

  Accordingly, the mixing element according to FIG. 1 comprises an installation body 1 for installation in a tubular mixer housing, wherein the installation bodies 1, 101 are longitudinally aligned with the direction of the fluid flowing into the installation body 1. It has an axis 10. The installation body 1 can extend into the mixing space 20 bounded on the peripheral side by a mixer housing (not shown). For ease of understanding, a cubic mixing space is shown in FIG. The side of the cube can be the inner wall of the mixer housing. The fluid flows in the direction of the installation body 101 from the cubic covering surface forming the flow cross section 22.

  The installation body 1 and the installation body 101 have the same structure, but the installation body 101 is rotated by 180 ° around the longitudinal axis 10. Like the mixing space 20, the mixing space 120, in a plane 121 arranged perpendicular to the longitudinal axis 10, essentially corresponds to the flow cross section 122 of the tubular mixer housing surrounding the installation body 101. Have In the case of installation bodies 1, 101 having at least one symmetry plane that divides the mixing space into two equal parts, the longitudinal axis is arranged in this symmetry plane. The mixing space is bounded by a mixer housing (not shown). In this embodiment, the mixing element should be installed in a mixer housing having a rectangular or square cross section. The inner dimension of the mixer housing used to determine the equivalent diameter is indicated by reference line 36.

  The installation body 1 includes at least one first wall element 2 that serves to divide the fluid flow into a two-part flow that flows substantially parallel to the longitudinal axis 10. The wall element 2 has a first side wall 3 and a second side wall 4. The intersection of the first wall element 2 and the plane 21 results in a cross section 23. The cross section 23 here is at most 1/5, preferably at most 1/10, particularly preferably at most 1/20 of the flow section 22 of the mixing space 20 without installation bodies. The fluid therefore flows on both sides of the side walls 3, 4 of the wall element 2. The direction of fluid flow is indicated by arrows. The wall element has a substantially rectangular cross section. The first wall element 2 has a first width side 5, a second width side 6, a first vertical side 25, and a second vertical side 35. The first width side edge 5, the second width side edge 6, the first vertical side edge 25, and the second vertical side edge 35 form the peripheral edges of the side walls 3 and 4. The vertical sides 25 and 36 extend substantially in the direction of the longitudinal axis 10, and the first width side 5 and the second width side 6 extend laterally with respect to the direction of the longitudinal axis. . The first wall element 2 divides the mixing space into two parts. The wall element 2 has the function of a rod-like element that divides the fluid flow into two parts, and their deflection is negligible except for the deflection at the edge of the first width side 5. The wall thickness 7 of the wall element 2 is usually less than 1 mm for a mixing element with a total length of up to 100 mm.

  Adjacent to the first wall element 2 is a deflection element 11 which serves to deflect a part of the flow in a direction different from the longitudinal axis. The deflection element has on both sides of the wall element 2 deflection surfaces extending transversely to the wall element. A first opening 12 is provided on the side facing the first side wall 3 of the wall element 2 in the deflection plane.

  In the embodiment according to FIG. 1, the crossing angles between the first wall element 2 and the second wall element 8 or the third wall element 9 are each 90 °. According to FIG. 1, the first wall element 2 is coupled to the second wall element 8 and the third wall element 9 via a deflection element 11. The deflection element 11 is preferably arranged in a plane aligned parallel to the plane 21 or arranged at a certain tilt angle with respect to that plane, the tilt angle being 60 ° or less, preferably 45 ° or less. Particularly preferably, it is 30 ° or less. The smaller the inclination angle between the plane of the deflection element 11 and the plane 21, the shorter the required structural length. In other words, the plane of the deflection element 11 is substantially at an angle of 45 ° to 90 °, preferably 60 ° to 90 °, particularly preferably 75 ° to 90 ° with respect to the longitudinal axis 10. Arranged in an aligned lateral plane.

  The wall elements 8, 9 adjacent to the deflection element 11 delimit the passage starting from the first opening 12 and extending in the direction of the longitudinal axis 10. The expression “adjacent to the deflection element” means that the second wall element 8 and the third wall element 9 are arranged opposite the first wall element 2 in the direction of the longitudinal axis, i.e. of the flow. It means that it is arranged downstream of the first wall element 2 in the direction.

  A second opening is provided on the side of the wall element 2 facing the second side wall 4 in the deflection plane, and the second wall element 8 or the third wall element 9 is adjacent to the second opening. To do. The second wall element 8 and the third wall element 9 delimit the same passage, also starting from the first opening 12.

  Accordingly, the second wall element 8 and the third wall element 9 are arranged adjacent to the first opening 12. The second wall element 8 and the third wall element 9 have inner walls 81, 91 and outer walls 82, 92 extending in the direction of the longitudinal axis 10, each extending substantially in the direction of the longitudinal axis 10. . The second wall element 9 has an inner wall 81 and an outer wall 82. The third wall element has an inner wall 91 and an outer wall 92. In this embodiment, the inner walls 81, 91 and the outer walls 82, 92 extend in the direction of the longitudinal axis, that is, in the longitudinal direction of the drawing. Each of the inner walls 81, 91 and the outer walls 82, 92 can comprise an angle between 20 ° and 160 ° with respect to the first side wall 3 or the second side wall 4 of the first wall element 2. The first opening 12 is arranged between the inner walls 81, 91 of the second wall element 8 and the third wall element 9. The second opening 13 and the optional third opening 14 are arranged outside one of the outer walls 82, 92 of the second wall element 8 or the third wall element 9. The second opening 13 and the third opening 14 are provided on the side facing the second side wall 4 of the first wall element 2 in the deflection surface. The inner wall of each wall element can in particular be parallel to its outer wall. Furthermore, the second wall element and the third wall element can have inner walls 81, 91 and outer walls 82, 92, which are parallel to each other.

  The first wall element 102 of the second installation body 101 is adjacent to the second wall element 8 and the third wall element 9. The second installation body 101 extends in the direction of the longitudinal axis 10 of the mixing element and has a first side wall 103 and a first side wall 103 arranged opposite to the first side wall 103. It has an element 102. The first sidewall 103 and the second sidewall 104 are disposed substantially parallel to the longitudinal axis 10.

  A deflection element 111 is arranged adjacent to the first wall element 102. The deflection element 111 has a deflection surface extending laterally with respect to the wall element 102 on both sides thereof. A first opening 112 is provided on the side of the wall element 102 in the deflection plane facing the second side wall 104. A second wall element 108 and a third wall element 109 are arranged opposite the first wall element 102 adjacent to the first opening 112 in the direction of the longitudinal axis 10. That is, the second wall element 108 and the third wall element 109 are located downstream of the first wall element 102. The second wall element 108 and the third wall element 109 delimit the passage starting from the first opening 112 and extending in the direction of the longitudinal axis 10. Second openings 113 and 114 are provided on the side of the wall element 102 in the deflection plane facing the first side wall 103. The second wall element 108 or the third wall element 109 is adjacent to the second openings 113, 114.

  The second wall element 108 and the third wall element 109 are disposed adjacent to the first opening 112. The second wall element 108 and the third wall element 109 extend in the direction of the longitudinal axis 10 of the mixing element. The second wall element has an inner wall 181 and an outer wall 182, and the third wall element has an inner wall 191 and an outer wall 192. The outer walls 182, 192 and the inner walls 181, 191 extend substantially in the direction of the longitudinal axis 10 of the mixing element. In this embodiment, they are each parallel to each other. Each of the inner walls 181, 191 and the outer walls 182, 192 is between 20 ° and 160 °, in this case 90 °, with respect to the first side wall 103 or the second side wall 104 of the first wall element 102. Includes angle. The first opening 112 is disposed between the inner walls 181, 191 of the second wall element 108 and the third wall element 109, and the at least one second opening 113, 114 is a second wall element. 108 or one of the outer walls 182, 192 of the third wall element 109. The second opening 113 and / or the third opening 114 are provided on the side of the first wall element 102 facing the second side wall 104 in the deflection surface.

  The second installation body 101 including the first wall element 102, the deflection element 111, the second wall element 108 and the third wall element 109 has a longitudinal axis 10 with respect to the first installation body 1. Arranged around 10 ° to 180 ° around, rotated by an angle of 180 ° in a specific example.

  The first installation body 1 and the second installation body 101 have the same structure, i.e. they comprise the same wall elements and the same deflection elements, which are respectively arranged at the same angle and distance from each other.

  The first installation body 1 and the second installation body 101 are connected to each other via a plurality of common bar-shaped elements 15, 16, 17, 18.

  FIG. 2 shows an example of a cross section of a mixing element according to a second embodiment of the invention. The structure of the mixing element is not substantially different from the mixing element according to FIG. 1, and therefore the same reference numerals as in FIG. 1 are used for the same parts. In the following, only the differences from the embodiment according to FIG. 1 should be considered. A first installation body 1 and a second installation body 101 of mixing elements are shown. The installation body is for installation in a mixer housing having a circular or elliptical cross section. The range of the cross section of the inner wall of the mixer housing (not shown) is represented by an alternate long and short dash line. The diameter of the mixer housing is indicated by reference line 36.

  FIG. 3 shows an overview of a first embodiment of a mixing element according to the invention. The mixing element includes the installation body shown in FIG. In addition, the mixing element includes an inlet element that includes a supply path for the components to be mixed. The mixing ratio of the two components can be equal to 1: 1 but can be different, i.e. not equal to 1: 1. FIG. 3 shows eleven installation bodies. All the installation bodies are connected to each other by rod-like elements 15, 16, 17, 18.

  FIG. 4 shows a cross section through the installation body 1 of FIG. The first wall element 2 and the rod-like elements 15, 16, 17, 18 are shown in cross section. In the cross-section according to FIG. The deflection element 11 comprises a first opening 12 arranged in FIG. 4 on the left side of the first wall element 2, ie on the first side wall 3 side of the first wall element 2. The second opening 13 and the third opening 14 are arranged on the opposite side, that is, on the second side wall 4. The first opening 12 is arranged in an offset state with respect to the second opening 13 and the third opening 14. A partial element 26 of the deflection element is arranged between the second opening and the third opening. The fluid impinging on the partial element 26 is deflected in the direction of the second opening 13 and the third opening 14. On the peripheral side, the second opening 13 and the third opening 14 are bounded by the mixer housing 210.

  FIG. 5 shows a section through the second wall element 8 and the third wall element 9 of the installation body 1. The viewing direction is the direction of flow, and therefore the first wall element 102 of the installation body 101 is visible. The deflection element 111 is adjacent to the first wall element 102 of the installation body 101. The deflection element 111 includes a first opening 112 arranged on the second side wall 104 side. The second opening 113 and the third opening 114 are disposed on the first side wall 103 side. The second opening 113 and the third opening 114 are arranged in an offset state with respect to the first opening 112. The first opening 112, the second opening 113, and the third opening 114 are arranged so that the partial elements are respectively arranged on the opposite sides of the opening, that is, the first opening 112. A first partial element 126 is disposed opposite the second partial element 127 opposite to the second opening 113, and a third partial element 128 is disposed opposite the third opening. ing.

  FIG. 6 shows a cross section through the static mixer inlet section and the mixing element according to FIG. The static mixer includes a mixer housing 210 that receives mixing elements and inlet elements therein. The mixer housing is received within a connection element 220 that serves to connect to the cartridge.

  The rod-like elements 15, 16, 17, 18 hold all installation bodies of the mixing elements connected to one another. Each of the bar elements increases the bending rigidity of the static mixer. Furthermore, the rod-shaped element can prevent the breakage of the mixing element during operation of the mixer, especially when at least two mixing elements are arranged on the opposite side of the first wall element. Furthermore, the rod-shaped element ensures that during the production of the installation body in the injection molding process, the molten polymer can flow from the first installation body 1 to the first and all other installation bodies 101 arranged downstream. . That is, when there is no rod-shaped element, the transition from the wall element 8 or 9 to the wall element 102 disposed downstream is composed of only a common cross section and its optional reinforcing material. That is, in this case, the cross section consists of two squares having side lengths corresponding to the wall thickness of 7. All of the molten polymer for the installation body disposed downstream must pass through these restriction points, thereby creating a local pressure peak in the tool. In addition, in the region of the wall element that becomes closer to the tubular housing when in use, the residence time of the molten polymer is increased, resulting in variations in the molten polymer and, in some circumstances, degradation of physical properties and heterogeneity. Thus, such mixing elements can only be produced in the prior art by using a melt containing a foaming agent to produce a foam structure.

  For this reason, according to the present invention, in the manufacturing process, rod-shaped elements are provided for sending the molten polymer from one installation body to each of the adjacent installation bodies.

  Static mixers are usually manufactured from plastic, because even relatively complex shapes can be realized in an injection molding process. In particular, in the case of a static mixer including a plurality of installation bodies, the installation bodies 1, 101 as a whole have a certain length dimension 24, and each of the cross-sectional areas 23, 123 has a certain wall thickness 7. The ratio of the length dimension 24 to the wall thickness 7 is at least 40, preferably at least 50, particularly preferably at least 75. In a preferred use of the static mixer for low flow filler materials, the wall thickness 7 is less than 3 mm, preferably less than 2 mm, particularly preferably less than 1.5 mm. The entire installation body 1, 101 has a longitudinal dimension 24 of between 5 and 500 mm, preferably between 5 and 300 mm, preferably between 50 and 100 mm.

DESCRIPTION OF SYMBOLS 1 1st installation body 2 1st wall element 3 1st side wall 4 2nd side wall 5 1st width side edge 6 2nd width side edge 7 Wall thickness 8 2nd wall element 9 3rd wall Element 10 Longitudinal axis 11 Deflection element 12 First opening 13 Second opening 14 Third opening 15, 16, 17, 18 Bar-shaped element 20 Mixing space 21 Plane 22 Flow section 23 Section 25 First Vertical side 26 Partial element 35 Second vertical side 36 Reference line 81 Inner wall 82 Outer wall 91 Inner wall 92 Outer wall 100 Mixing element 101 Second installation body 210 Mixer housing 220 Connecting element

Claims (14)

A mixing element for a static mixer for installation in a tubular mixer housing, the mixing element having a longitudinal axis (10), and a plurality of installation bodies (1, 101) in said longitudinal direction The first installation body (1) has a first wall element (2) which is arranged along the axis (10) of the first wall element 10 and extends in the direction of the longitudinal axis. (2) has a first side wall (3) and a second side wall (4) arranged on the opposite side of the first side wall (3), the first wall element (2) A deflection element (11) is arranged adjacent to the first wall element (2) with a deflection surface extending laterally with respect to the first wall element (2). A first opening (12) on both sides, provided on the deflection surface on the side facing the first side wall (3) of the first wall element (2); A second wall element (8) and a third wall element (9) are arranged adjacent to the first opening (12), and the second wall element (8) and the third wall are arranged. An element (9) extends in the direction of the longitudinal axis (10) and each extends substantially in the direction of the longitudinal axis (10) an inner wall (81, 91) and an outer wall (82, 92). ), And each of the inner wall (81, 91) and the outer wall (82, 92) is the first side wall (3) or the second side wall (4) of the first wall element (2). With respect to the inner wall (81) of the second wall element (8) and the third wall element (9). 91) and a second opening (13, 14) is provided on the outer wall (8) of the second wall element (8) or the third wall element (9). 2, 92), the deflection of the second opening (13, 14) on the side facing the second side wall (4) of the first wall element (2). A mixing element provided on the surface, wherein the first wall element (102) of the second installation body (101) is adjacent to the second wall element (8) and the third wall element (9) In
More than five installation bodies are connected to each other via a common bar-like element (15, 16, 17, 18) ;
All installation bodies of the mixing elements are connected by the rod-like elements (15, 16, 17, 18); and
The mixing element characterized in that the rod-like elements (15, 16, 17, 18) are arranged on the outer periphery of a plurality of deflection elements (11, 111) of the connected installation body .   The second installation body (101) has the first wall element (102) extending in the direction of the longitudinal axis (10), the first wall element (102) being a first wall element (102). A side wall (103) and a second side wall (104) disposed on the opposite side of the first side wall (103), and adjacent to the first wall element (102) a deflection element (111) ) And the deflection element (111) has deflection surfaces extending laterally with respect to the first wall element (102) on both sides of the first wall element (102), An opening (112) is provided in the deflection surface on the side facing the second side wall (104) of the first wall element (102) and adjacent to the first opening (112). , A second wall element (108) and a third wall element (109) are arranged, said second wall element (108) and said third wall element An element (109) extends in the direction of the longitudinal axis (10) and each substantially extends in the direction of the longitudinal axis (10) an inner wall (181, 191) and an outer wall (182, 192). ), And each of the inner wall (181, 191) and the outer wall (182, 192) is the first side wall (103) or the second side wall (104) of the first wall element (102). And the first opening (112) includes the inner wall (181) of the second wall element (108) and the third wall element (109). , 191) and the second opening (113, 114) is one of the outer wall (182, 192) of the second wall element (108) or the third wall element (109). Two outer openings (113, 14) is provided on the deflection surface on the side of the first wall element (102) facing the first side wall (103), the first wall element (102), the deflection element (111) The second installation body (101) including the second wall element (108) and the third wall element (109) is arranged in the longitudinal direction with respect to the first installation body (1). 2. Mixing element according to claim 1, wherein the mixing element is arranged rotated about an axis (10) by an angle between 10 ° and 180 °.   The second installation body (101) has the same structure as the first installation body (1) and / or the first installation body (1) is the second installation body (101). The mixing element according to claim 1, wherein the mixing element is arranged rotated about the longitudinal axis by an angle of 180 °. The rod-shaped element (15, 16, 17, 18) is provided on each side of the plurality of first wall elements (2, 102) of the first and second installation bodies (1, 101). Item 4. The mixing element according to any one of Items 1 to 3 . Claims previous SL two rod-like elements to each sides of a plurality of said first wall element (2, 102) of the first and second installation body (1, 101) (15, 16, 17, 18) is provided Item 5. The mixing element according to any one of Items 1 to 4 . 2. The plurality of first wall elements (2, 102) of the first and second installation bodies (1, 101) include an angle of 90 ° to 130 ° with respect to the respective deflection surfaces. A mixing element according to any one of claims 1 to 5 . The one or more deflection surfaces have surfaces that are at least partially curved in the direction of the flowing fluid to deflect the fluid flow in a direction different from the longitudinal axis (10). The mixing element according to any one of 6 to 6 . Mixing element according to any one of claims 1 to 6 one or more of said deflecting surface is substantially flat. One or more of the deflecting surface is substantially as described in any one of claims 1 extends at an angle of 90 ° to 8 for each of the first wall element (2,102) Mixed elements. The deflection surface of the first installation body (1) is arranged so that the first and second openings (112, 113, 114) of the second installation body (101) in the direction of the longitudinal axis (10). 10) A mixing element according to any one of claims 1 to 9, which is designed to cover. The surface of one or more of the deflection elements on the side facing the first side wall of each first wall element (2, 102) is between 60 ° and 90 ° with respect to the longitudinal axis mixing element according to any one of claims 1 to 10 located in the plane of the the transverse alignment by an angle. The surface of one or more of the deflection elements on the side facing the second side wall of each first wall element (2, 102) is between 60 ° and 90 ° with respect to the longitudinal axis. mixing element according to any one of claims 1 to 11 located in the plane of the the transverse alignment by an angle. The second wall element (8) and the third wall element (9) of the first installation body (1), and the first wall element (102) of the second installation body (101). mixing element according to their connection point, in any one of claims 1 to reinforcing elements are provided to 12 between. Static mixer comprising mixing elements according, and a mixer housing which surrounds the mixing element to any one of claims 1 to 13.

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